https://blog.nbdawn.com/kr/categories/computer-architecture/Recent content in Computer Architecture on nbdawn's BlogHugo -- 0.160.1krDJ.Kim 2025Fri, 02 Jan 2026 00:00:00 +0000https://blog.nbdawn.com/kr/posts/why-my-second-gpu-is-lazy-the-hidden-bottleneck-of-x86-io.ko/Fri, 02 Jan 2026 00:00:00 +0000https://blog.nbdawn.com/kr/posts/why-my-second-gpu-is-lazy-the-hidden-bottleneck-of-x86-io.ko/Understand how CPUs communicate with GPUs, NVMe drives, and network cards. Learn about MMIO, DMA, PCIe topology, and why your second GPU might be slower than expected.